Re: Very low disk performance Highpoint 1820a

From: Marcus Grando (marcus_at_corp.grupos.com.br)
Date: 04/29/05

  • Next message: Steven Hartland: "Re: Very low disk performance Highpoint 1820a" 
    Date: Fri, 29 Apr 2005 09:46:49 -0300
To: freebsd-current@freebsd.org

    You try with iozone (benchmarks/iozone)?

    Regards

    Steven Hartland wrote:
    > I've just finished putting together a new server box spec:
    > Dual AMD 244, 2GB ram, 5 * Seagate SATA 400GB on a
    > Highpoint 1820a RAID 5 array.
    > The machine is currently running 5.4-STABLE ( from the
    > weekend ) After install I did some basic tests and the
    > disk is return very poor performance low in fact than a
    > single disk on a bog standard ATA 100 controller:
    >
    > 5.4-STABLE Highpoint 1820a RAID 5 ( 5 disk )
    > dd if=/dev/da0 of=/dev/null bs=64k count=10000
    > 10000+0 records in
    > 10000+0 records out
    > 655360000 bytes transferred in 13.348032 secs (49097875 bytes/sec)
    >
    > 5.3-RELEASE Highpoint 454 RAID 5 ( 4 disk )
    > dd if=/dev/da0 of=/dev/null bs=64k count=10000
    > 10000+0 records in
    > 10000+0 records out
    > 655360000 bytes transferred in 20.410034 secs (32109697 bytes/sec)
    >
    > 5.2.1-RELEASE Intel ICH3 UDMA100 ( 1 disk )
    > dd if=/dev/ad0 of=/dev/null bs=64k count=10000
    > 10000+0 records in
    > 10000+0 records out
    > 655360000 bytes transferred in 11.142405 secs (58816745 bytes/sec)
    >
    > Obviously something is seriously a miss here somewhere as
    > both the RAID 5 arrays a producing less throughput than
    > a single disk.
    >
    > Where do I start looking?
    >
    > Steve 

    -- 
Marcus Grando
Grupos Internet S/A
marcus(at)corp.grupos.com.br
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  • Next message: Steven Hartland: "Re: Very low disk performance Highpoint 1820a"

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